sheldrick



(Mode1.) v 2 Sheets-Sheet 1.

" D. J. SHELDRIGK.

DRIVE CHAIN.

No. 428,863 Patented May 27, 1890.

iii.

(Mode1.) 2 Sheets-fleet 2..

. D. J. SHELDRIOK.

DRIVE CHAIN.-

No. 428,863. w Patented May 27, 1890.

\ AMA UNITED STATES I PATENT QFFICE.

DAVID J. SHELDRIOK, OF COLUMBUS, OHIO, ASSIGNOR TO JOSEPH A. JEFFREY, OFSAME PLACE.

DRIVE-CHAIN.

SPECIFICATION forming part of Letters Patent No. 428,863, dated May 27,189.0.

Application filed July 23, 1889- -$erial No, 8181 To all whom it mayconcern.-

Be it known that 1, DAVID J. SHELDRIoK, a citizen of the United States,residing at O0- lumbus, in the county of Franklin and State of Ohio,have invented certain new and useful Improvements in Drive-Chains, ofwhich the following is a specification, reference being had therein tothe accompanying drawlngs.

Figure 1 is a plan View of my chain straightened out. Fig. 2 is an edgeview looking in the direction of the arrow 1, Fig. 1. Fig. 3 is an edgeview looking in the opposite direction. Fig. 4 is a horizontal sectionon the line 00 a, Fig. 3. the chain shown in Fig. 4 with the links inposition for detaching them from one another. Figs. 6 and 7 are reversedviews of one of the links detached. Fig. 8 is a vertical section on line'yy, Fig. 6, looking in the direction of the arrow 2 of that figure.Fig. 9 is a detached view, enlarged, of the pintle. Fig. 10 is avertical section on line 2 z, Fig. 1, looking in the direction of thearrow 3 of that figure, the anti-friction roller being omitted. Fig. 11is an edge view of three links.

Like reference-letters refer to like parts in all the figures.

A B O D are side bars provided with sleeves E F cast integral therewith,and with pintleseats having notches which can be made to register witheach other by placing the side bars at angles to each other, but whichdo not thus register when the links are straightened out into workingposition, as willbe explained. The end A is somewhat expanded andprovided with a pintle-seat, which is preferably round in transversesection, except that it is notched at a, and is constructed with asunken portion or recess a on its outer face. The opposite end B has asimilar pintle-seat and notch b,with also an inward-projecting shortsleeve E, the inner end of which is formed with a peripheral flange, asindicated at 9, (see figures,) leaving a recess which is continuous,except at e. The opposite side bar of the pair has at the end O apintle-seat and notch c, and at its opposite end a similar pintle-seatand notch cl, with an inward-pro ectmg sleeve F, which is reduced,leaving the shoulder f extendlng around its periphery,

Fig. 5 is a View of the edge of except at f, where it is of fulldiameter to fit the corresponding part c of the sleeve E.

These overlapping shoulders serve to mutually support each other tomaintain the inside pintle-seats in line with each other, and alsooperate to prevent dirt from working through into the articulation.

I am aware that pintles have been made in sections which project inwardfrom the side bars and have been formed with dovetailed parts to preventthe sections from being separated by an endwise movement, such sectionsbeing free to move laterally one upon the other; but the overlappinginterlocking surfaces of my sleeves perform an entirelydifferentfunction, in that, among other things, they prevent independentlateral movement of one sleeve relatively to the other, but do notsupport them against endwise separation.

The pintle (shown detached in Fig. 9) is circular in cross-sectionthroughout its greater part or length, as at G, and has at one end ahead G,'with a locking-spur g at its opposite end and a short spline gadjacent to the head, the lug and spline being located in planes whichintersect each other at the axis of the pintle at an angle of aboutninety degrees.

In assembling the parts to form a chain the pintle may be first thrustthrough the end O of one of the side bars and then through the sleevesof two other side bars successively; or three side bars may be placed inabout the position indicated by full and dotted lines, Fig. 11, when thepintle can be thrust directly through the pintle-seat of the end O andof the sleeves E F of adjacent side bars. Then these three links may bestraightened out, as indicated in full lines, Fig. 11, at which time thespur g of the pintle will occupy the position indicated in Fig. 5. Thenthe fourth link A B maybe placed in the position indi cated in Fig.5,when the spur will pass through the notch 19 of that side bar, afterwhich it (the side bar) may be swung around 011 the pintle and theinnerend of its sleeve engaged with the inner end of the sleeve F of theopposing side bar of the pair, substantially the same operation beingrepeated until a chain of the desired length is made up and its endsunited.

When it is desired to add anti-friction rollers, the first one may beapplied to the sleeves of the first pair of side bars, which are mountedupon a pintle, the second one being applied to the long sleeve F beforethe swinging end of the downward-projeeting link (shown in Fig. is swungup into line with the other links, there being sui'iicient looseness ofparts to permit the end B of such link to be moved outward into theposition shown in dotted lines, Fig. 4, so that the inner end of itsshort sleeve E will pass the end or edge of the antifrietion roller andenter the roller, and the recess or socket within the flanged end of theshorter sleeve E will pass over and engage with the shouldered end ofthe longer sleeve F.

It is apparent that by reason of the sleeve E being very shortanti-friction rollers can be applied as the parts of the chain are beingassembledwithout neeessitatingthe undesirable looseness of parts whichwould be required in case the sleeves were of such length as to meet inthe centers of the rollers.

I prefer to have the sect-ion e and the notch or cut-out part f upon theupper sides of the sleeves, in order to insure that the parts of r thearticulation which are under the greatest tension may have as regular anoutline as is possible to guard against undue wear.

\Vhile I have described the best mode now known to me for carrying outmy invention, I do not wish to be limited to the details of constructionherein shown, because many modifications can be readily devised by oneskilled in the art of chain-making without 5 departing from the scope ofmy in'lprovement.

the rollers, of the separable and independently-swinging side barsprovided at their ends with inward-projecting sleeves of diilferentlengths, substantially as set forth.

2. In a drive-chain, the combination, with the pintles, of the separableside bars provided at their ends with inward-projecting sleeves, theinner ends of which are formed with interlocking surfaces to preventindependent lateral movement of the sleeves, substantially as set forth.

3. In a drive-chain, the separable side bars provided with projectingsleeves, the sleeve of one side bar having a peripheral flange, thesleeve of the other side bar having a re dueed end to enter within theperipheral flange, substantially as set forth.

I. In a drive-chain, the separable side bars provided with the sleeves,of which one is formed with a projection, as at e, and the other is cutout, as at f, substantially as set forth.

In a drive-chain, separable side bars having at their ends pintle seatsand notches, the notches in the adjacent ends being at angles to eachother, in combination with pintles having at their ends lugs projectingin different planes, whereby the links are adapted to be coupled onlywhen the side bars are at angles to each other, substantially as setforth.

In testimony whereof I affix my signature in presence of two witnesses.

DAVID J. SllELDRICK.

Witnesses:

LUOIAN LINDsEv, E. E. CoRwIN.

